Securities - Securities with Unrealized Losses Aggregated by Investment Category and Time with Unrealized Loss Position (Details) - USD ($) $ in Thousands	Jun. 30, 2023	Dec. 31, 2022
Debt and Equity Securities, FV-NI [Line Items]
Less than 12 months, fair value	$ 22,394	$ 153,118
Less than 12 months, unrealized losses	1,533	15,751
More than 12 months, fair value	498,557	375,245
More than 12 months, unrealized losses	78,100	73,290
Total, fair value	520,951	528,363
Total, unrealized losses	79,633	89,041
U.S. Treasury Notes and Bonds [Member]
Debt and Equity Securities, FV-NI [Line Items]
Less than 12 months, fair value	0	0
Less than 12 months, unrealized losses	0	0
More than 12 months, fair value	78,395	78,204
More than 12 months, unrealized losses	12,184	12,606
Total, fair value	78,395	78,204
Total, unrealized losses	12,184	12,606
State and Municipal [Member]
Debt and Equity Securities, FV-NI [Line Items]
Less than 12 months, fair value	1,311	89,158
Less than 12 months, unrealized losses	31	12,612
More than 12 months, fair value	231,235	140,390
More than 12 months, unrealized losses	39,112	34,939
Total, fair value	232,546	229,548
Total, unrealized losses	39,143	47,551
Mortgage-backed [Member]
Debt and Equity Securities, FV-NI [Line Items]
Less than 12 months, fair value	21,083	63,249
Less than 12 months, unrealized losses	1,502	3,093
More than 12 months, fair value	176,566	144,318
More than 12 months, unrealized losses	26,262	25,047
Total, fair value	197,649	207,567
Total, unrealized losses	27,764	28,140
Corporate [Member]
Debt and Equity Securities, FV-NI [Line Items]
Less than 12 months, fair value	0	711
Less than 12 months, unrealized losses	0	46
More than 12 months, fair value	705	0
More than 12 months, unrealized losses	54	0
Total, fair value	705	711
Total, unrealized losses	54	46
Asset-backed Securities [Member]
Debt and Equity Securities, FV-NI [Line Items]
Less than 12 months, fair value	0	0
Less than 12 months, unrealized losses	0	0
More than 12 months, fair value	11,656	12,333
More than 12 months, unrealized losses	488	698
Total, fair value	11,656	12,333
Total, unrealized losses	$ 488	$ 698

Amount of investment in debt security measured at fair value with change in fair value recognized in other comprehensive income (available-for-sale), in continuous unrealized loss position for more than 12 months, without allowance for credit loss. Includes beneficial interest in securitized financial asset.

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